Intentionally damaging another person's property without consent, and the damage is less than $500;

Entering upon the land or premises of another person without authority for an unlawful purpose; or

Remaining on someone else's property after the owner has already asked you to leave.

For Zhao, it's alleged that she entered Bieber's mansion through an unlocked door; she claimed she was there for his birthday party. That party, however, took place earlier in the week at another location, the AJC reports.

Zhao also told police that she's friends with Bieber -- though police believe she's just one of his 50 million Twitter followers. Without actual permission from Bieber to enter his mansion, Zhao will have a hard time proving she wasn't trespassing.

So even though Zhao apparently entered Bieber's home without permission, news reports don't indicate that she intended to commit a felony or steal anything (aside from a few winks) while inside the mansion. Based on the facts available, it seems like Zhao was just a big fan who believed Bieber was her friend and wanted to get closer to the singer.

Next time, maybe Bieber should double-check his locks before heading out, because Bieber Fever is very real.